Preparation method of water-borne epoxy resin coating using poly-perfluoroalkyl ethanol-acrylic acid derivative as water repellent agent

A water-based epoxy resin, ethanol acrylic acid technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problem of not having oil-proof performance, and achieve the effect of excellent curing effect, good water resistance, and good superhydrophobicity

Active Publication Date: 2018-11-13
上海豪立涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acrylic polymer itself has the characteristics of good film-forming property and relatively loose network structure. Although polyacrylate polymer has good water resistance, easy to obtain raw materials, simple operation and low cost, it does not have oil-proof performance.

Method used

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  • Preparation method of water-borne epoxy resin coating using poly-perfluoroalkyl ethanol-acrylic acid derivative as water repellent agent
  • Preparation method of water-borne epoxy resin coating using poly-perfluoroalkyl ethanol-acrylic acid derivative as water repellent agent
  • Preparation method of water-borne epoxy resin coating using poly-perfluoroalkyl ethanol-acrylic acid derivative as water repellent agent

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Synthesis and contact angle test of example 1 perfluoroalkyl acrylate polymer

[0019] Dissolve perfluoroalkylethanol (20.7g, 50mmol) in 50mL of DMF, add 3.75mL of triethylamine as a catalyst, then cool in an ice-water bath, drop in acryloyl chloride (4.85mL, 60mmol), remove the ice water, and react with magnetic stirring for 5 hours , after the end, the reaction solution was poured into 100mL ethyl acetate and 100mL saturated brine, separated, the aqueous phase was extracted three times with 50mL ethyl acetate, the organic phase was combined, washed twice with 100mL saturated brine, and removed by rotary evaporation. solvent to obtain perfluoroalkyl acrylate, 19 g of yellow colloidal solid, yield 81%. 1HNMR (CDCl 3 , 500MHz), δ: 6.46 (d, 1H, CH 2 =), 6.13(m, 1H, -CH=), 4.47(m, 2H, -CH 2 -), 2.55(m, 2H, -CH 2 -).

[0020] Add perfluoroalkyl acrylate (8.91g, 19mmol), styrene (1.98g, 19mmol) and 150mL ethyl acetate into the flask, under nitrogen protection, heat to r...

example 2

[0022] The preparation of example 2 curing agent

[0023] 1.06g of ethanolamine and 2.04g of epoxy resin were dissolved in 10mL of dioxane, heated to 80°C in a water bath, condensed and refluxed for 2h, then 0.08g of sodium hydroxide was added, the reaction was continued for 3h, and 1.69g of a light yellow solid was obtained by evaporation.

example 3

[0024] The preparation of example 3 emulsion

[0025] Under mechanical stirring, put 58.9g E-44 type epoxy resin and 30.0g polyethylene glycol into a 100ml three-necked flask, place it in an oil bath, raise the temperature to 180°C, add 0.76g ammonium persulfate, and keep at 180°C Constant temperature, mechanical stirring for 2 hours to prepare emulsifier, brown liquid. After the temperature dropped to room temperature, the emulsifier solidified and became solid. Put 47.44g of epoxy resin and 9.65g of the above-mentioned emulsifier into the bottle, heat to 60°C in a water bath and keep the temperature constant, add 25g of distilled water at a uniform speed, and stir mechanically for 1 hour to prepare the emulsion.

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PUM

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Abstract

The invention discloses a preparation method of a water-borne epoxy resin coating using a poly-perfluoroalkyl ethanol-acrylic acid derivative as a water repellent agent. The preparation method comprises the following steps that 1.75 g of curing agent, 3.75 g of emulsion and 0.68 g of perfluoroalkyl acrylate polymer water repellent agent are added into a reaction container, 5 mL of distilled wateris dropwise added under the condition of constant temperature 50 DEG C, and mechanical stirring is performed for 1 hour to obtain the water-borne coating. The preparation method uses a self-prepared emulgator to emulsify epoxy resin, emulsified liquid is good in stability, and no layering is produced after standing for several months. A curing agent having better water solubility is obtained through nucleophilic substitution of cholamine and E-44 type epoxy resin. The curing agent has the excellent curing effect on the epoxy resin emulsified liquid, and the coating is firm, good in stability and transparent and has certain luster after annealing and curing. The perfluoroalkyl acrylate polymer is used as the water repellent agent, so that the water resistance of the coating is better.

Description

technical field [0001] The invention relates to the preparation of a water-based epoxy resin coating using polyperfluoroalkyl alcohol acrylic acid derivatives as hydrophobic agents. Background technique [0002] Waterproof coating is a coating film waterproof layer that forms a continuous seamless whole and has a certain thickness under normal temperature conditions. Its waterproof mechanism can be divided into film-type waterproof and hydrophobic waterproof. The latter has received special attention because it uses low surface energy polymer materials and has functions such as anti-fouling and self-cleaning. [0003] Fluorine-containing polymers have the characteristics of extremely low surface tension, excellent heat resistance, and chemical stability. At the same time, compared with hydrogen atoms, fluorine atoms are easier to shield the C-F bond, effectively protecting carbon atoms and carbon chains. Therefore, it exhibits a high degree of stability, and shows stability...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/65C08F220/24C08F212/08
CPCC08F212/08C08F220/24C09D7/65C09D163/00C08L33/16
Inventor 焦岩谭明洋唐彪李俊陈敏东彭彦卿
Owner 上海豪立涂料有限公司
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